A Random Sample of Size N Has Been Selected from a Normally

question 97

Multiple Choice

A random sample of size n has been selected from a normally distributed population whose standard deviation is s. In estimating an interval for the population mean, the t-distribution should be used instead of the z-test if:

• A) n ?
• 30 and \(\sigma\) is known.
• B) \(\sigma\) is unknown and estimated by s, and the population is normal.
• C) Population is normal and \(\sigma\) is known.
• D) None of these choices are correct.

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Definitions:

Model and Subject

In research or educational contexts, the model is the system or example being studied or imitated, while the subject is the individual or entity being observed or experimented on.

Hostile Behaviors

Actions or attitudes that express anger, aggression, or resentment towards others.

Imitated

Copied or reproduced someone's behavior, action, or expression, often to learn or fit in.

Adolescents

People undergoing the phase of both physical and mental growth that typically happens from puberty until reaching the age of legal maturity.